/Python/How to create one list from 2d list python

How to create one list from 2d list python

How to create 2d list in python

o=[]
for i in range(0,rows):
    x=[]
    for j in range(0,cols):
        x.append(0)
    o.append(x)
#if you use [[0]*cols]*rows all rows will become the same list
#so editing in one row will edit all rows

How to create one list from 2d list python

>>> l = [[1, 2, 3], [4, 5, 6], [7], [8, 9]]
>>> sum(l, [])
[1, 2, 3, 4, 5, 6, 7, 8, 9]

Python declare 2d list

length, breadth = x, y
matrix = [[-1 for j in range(breadth)] for i in range(length)]
# every element is -1

Similar codes

2 votes258 views1 answer
ValueError: Found array with dim 3. Estimator expected <= 2.
Python
42 votes269 views3 answers
Python get command line arguments
Python
3 votes239 views2 answers
What day i s it
Python
2 votes292 views1 answer
Ln in python
Python
72 votes229 views3 answers
How to split a string by character in python
Python
0 vote265 views1 answer
How to call a python self-defined function in VSCode Terminal
Python
1 vote241 views1 answer
Python sftp put file
Python
1 vote267 views1 answer
Increase contrast cv2
Python
2 votes324 views1 answer
Pytorch create tensor
Python
0 vote253 views1 answer
Python code to replace first value of txt file
Python